JP2015004389A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To connect two members connected by a rivet in a state of free from displacement from each other even when one of insert holes is formed large.SOLUTION: In a vehicle seat, a front panel 12 and a side frame 11 of a seat cushion 3 are connected to each other by a rivet 13. The rivet 13 is inserted to the front panel 12 and the side frame 11 while penetrating through insertion holes 12A, 11A respectively formed thereon, and end portions of parts to which the rivet 13 is inserted, are caulked to be integrally connected to each other. The insertion hole 11A formed on the side frame 11 has a hole diameter larger than that of the insertion hole 12A formed on the front panel 12, and a part of the shape of the rivet 13 is pressed into the hole by caulking the rivet 13, so that a clearance gap in the radial direction between the hole and the rivet 13 is filled up.

Description

  The present invention relates to a vehicle seat. More specifically, the present invention relates to a vehicle seat in which two constituent members are coupled to each other by rivets.

  2. Description of the Related Art Conventionally, in a vehicle seat, a technique is known in which a panel material forming a skeleton of a seat cushion is integrally coupled to a floor side panel material by caulking (Patent Document 1). Specifically, a burring part for caulking is formed in a rising shape on the panel material on the floor side, a hole for receiving the burring part is formed in the panel material of the seat cushion, and the burring part is inserted into the hole and caulked. Thus, the two panel members are integrally joined to each other.

JP 2000-326664 A

  However, in the above prior art, since the hole diameter of the hole for receiving the burring portion is formed large to absorb the error in the assembly position between the two panel materials, the gap between the two even after the panel material is caulked. There is a risk of rattling. The present invention was devised as a solution to the above-mentioned problem, and the problem to be solved by the present invention is that two members joined by rivets are formed even if one insertion hole is formed large. In other words, it is possible to couple the components in a state where they are not displaced from each other.

In order to solve the above problems, the vehicle seat of the present invention takes the following means.
The first invention is a vehicle seat in which two constituent members are coupled to each other by rivets. The two component members are configured to be integrally coupled to each other by inserting a rivet so as to penetrate the insertion hole formed in each of the two component members and caulking the end portion into which the rivet is inserted. Yes. One of the insertion holes has a larger hole diameter than the other. When the rivet is caulked, a part of the shape of the rivet is pushed into the hole, and the radial direction between the rivet and the rivet. The gap is filled.

  According to the first aspect of the invention, even if the insertion hole formed in one of the constituent members is formed large for some purpose, a part of the shape of the rivet is pushed into the hole by caulking of the rivet. By filling the gap, one component member is coupled to the rivet so as not to rattle in the radial direction. Therefore, the two members coupled by the rivet as described above can be coupled so as not to be misaligned with each other even if one insertion hole is formed large.

  The second invention is the following configuration in the first invention described above. The two structural members are a side frame and a front frame of the seat cushion that are assembled in a state where they are superimposed on each other in the height direction. The front frame is disposed on the upper side of the side frame, and the insertion hole formed in the side frame disposed on the lower side has a larger diameter than the insertion hole formed in the front frame. The rivet is configured as a blind rivet that is inserted into each insertion hole from the upper side using a tool and fastened by pulling the inserted end portion upward.

  According to the second aspect of the invention, the position where the front frame is assembled to the side frame at a position where a large work space cannot be taken on the lower side, such as a contact portion between the side frame of the seat cushion and the front frame. Even if a large insertion hole for absorbing the error is formed, the blind rivet that can fasten both frames in a wide work space on the upper side can be combined easily and in a state where they are not misaligned with each other. it can.

  The third invention is the following configuration in the first or second invention described above. The front frame is assembled across the side frames on the left and right sides of the seat cushion, and is configured to be integrally coupled to each side frame by a fastening structure using rivets. The insertion hole formed in each side frame is formed as a long hole having a hole diameter longer in the sheet width direction than the insertion hole formed in the front frame.

  According to the third aspect of the present invention, the insertion hole formed in each side frame is formed in the front frame by straddling the front frame between the side frames and assembling with the rivets. By using a long hole that is longer in the seat width direction than the insertion hole, it is possible to achieve a configuration that can favorably absorb errors in the assembly position between the front frame and each side frame.

1 is a perspective view illustrating a schematic configuration of a vehicle seat of Example 1. FIG. It is the perspective view which expanded and expressed the frame structure of the seat cushion. It is the top view which expanded and represented the principal part of the frame structure of a seat cushion. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is the VV sectional view taken on the line of FIG. It is process drawing showing the state which mounted | wore the tool with the rivet. It is process drawing showing the state which inserted the rivet into two insertion holes. It is sectional drawing showing the internal structure of the rivet in the state of FIG. It is process drawing showing the state in the middle of pulling a mandrel and caulking a rivet. It is process drawing showing the state which the fastening by a rivet was completed. FIG. 6 is a cross-sectional view illustrating a main part structure of a vehicle seat of Example 2.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

  First, the configuration of the seat 1 (vehicle seat) according to the first embodiment will be described with reference to FIGS. As shown in FIGS. 1 to 2, the seat 1 of the present embodiment is configured as a passenger seat of an automobile, and includes a seat back 2 that serves as a backrest for a seated occupant and a seat cushion 3 that serves as a seating portion. It has a configuration with. The seat 1 has a so-called “manual seat” configuration in which the adjustment of the backrest angle of the seat back 2 and the seating position of the seat cushion 3 are performed by manual operation by releasing a lever (not shown). It has become.

  Specifically, the seat back 2 has a configuration in which lower end portions on both the left and right sides thereof are connected to rear end portions on both the left and right sides of the seat cushion 3 via recliners (not shown). As a result, the seat back 2 is normally held in a state in which the backrest angle is fixed by each of the recliners described above, and the recliner is unlocked by operating a lever (not shown) so that the backrest angle is set. It is set as the structure switched to the state which can be adjusted in the front-back direction.

  The seat cushion 3 is connected to a vehicle floor via a pair of left and right slide rails 4. Thus, the seat cushion 3 is normally held in a state where the seating position is fixed by the slide rails 4 described above, and the seat cushion 3 is seated by releasing the locked state of the slide rails 4 by operating a lever (not shown). The position can be switched to a state in which the position can be adjusted in the front-rear direction. As described above, the seat 1 according to the present embodiment can adjust the backrest angle of the seat back 2 (front and rear two directions) and adjust the seating position of the seat cushion 3 (front and rear two directions). The adjustment operation in four directions called “is possible”.

  The seat cushion 3 described above is fixed and supported on the upper part of the pair of left and right slide rails 4 via a support structure 5 including a pair of left and right front legs 5A and a rear leg 5B. The seat 1 of this embodiment includes a rivet 13 that includes side frames 11 on both the left and right sides of the cushion frame 10 that forms the skeleton of the seat cushion 3 described above, and a front panel 12 that is bridged between these front end portions. It is characterized in that it can be easily combined in a state in which they are not misaligned with each other. Here, the front panel 12 corresponds to the “front frame” of the present invention. Hereinafter, a specific configuration of the above-described seat cushion 3 will be described in detail.

  The seat cushion 3 has a configuration in which a metal cushion frame 10 constituting the skeleton is assembled in a square frame shape along the outer peripheral shape of the seat cushion 3. Specifically, the cushion frame 10 includes a pair of left and right side frames 11 and a front panel 12 that is bridged between the front end portions of the side frames 11 and supports the thighs of the seated occupant from below. The front rod 5C and the rear rod 5D made of a metal round pipe are assembled between the side frames 11 so as to pass through in the seat width direction and are integrally joined together. It is the structure assembled in the frame shape. A cushion pad made of urethane foam (not shown) that cushions and receives the load of the seated occupant and a cushion cover made of cloth (not shown) that covers the entire surface of the seat cushion 3 from the outside are attached to the upper portion of the cushion frame 10 described above. However, specific description of these configurations will be omitted.

  Each of the side frames 11 described above is formed of a pressed steel plate material, cut into a long plate shape in the front-rear direction, and disposed with the surfaces facing inward of the sheets. It is said that it was in the state. Each of the side frames 11 has a configuration in which the upper edge portion and the lower edge portion thereof are bent to the outside of the seat to increase the structural strength against bending and twisting.

  The front panel 12 is formed of a single pressed steel plate material in the same manner as each of the side frames 11 described above, and is cut into a long plate shape in the sheet width direction, and has a surface on the upper side of the sheet. It is in a state of being oriented. The front panel 12 is configured such that the front edge and the left and right edges are bent downward on the seat to increase the structural strength against bending and twisting. The front panel 12 has left and right edge portions of the top plate surface portion applied from above to the upper edge portion of the side frame 11 that is bent to the outside of the seat. The rivets 13 are integrally fastened and joined together.

  The cushion frame 10 described above is fixed to and supported by the upper portions of the slide rails 4 via a support structure 5 including a pair of left and right front legs 5A and rear legs 5B. Each of the above-described front legs 5A has one front leg 5A arranged on the outside of the vehicle shown on the right side as shown in the drawing, and is arranged on the outside of the side frame 11 on the same side. The other front leg 5 </ b> A disposed on the inner side of the vehicle shown in FIG. 5 is disposed inside the side frame 11 on the same side. And each front leg 5A penetrates these and each side frame 11, a round pipe-like front rod 5C is inserted, and it is welded integrally with the front rod 5C, and is joined, thereby the front rod 5C. It is set as the state couple | bonded integrally with each side frame 11 via. The lower end portion of each front leg 5A is in a state of being integrally bolted and coupled to the upper portion of each slide rail 4 serving as a floor member.

  Similarly, each of the rear legs 5B has one rear leg 5B disposed on the outer side of the vehicle shown on the right side as shown in the drawing, and is arranged on the outer side of the side frame 11 on the same side. The other rear leg 5 </ b> B arranged on the vehicle inner side shown in FIG. 3 is arranged inside the side frame 11 on the same side. And each rear leg 5B penetrates these and each side frame 11, a round pipe-shaped rear rod 5D is inserted, it is welded integrally with the rear rod 5D, and each is joined via the rear rod 5D. The side frame 11 is integrally coupled. The lower end portion of each rear leg 5B is in a state of being integrally bolted and coupled to the upper portion of each slide rail 4 serving as a floor member.

  Each of the slide rails 4 described above has a slide rail 4 on one side disposed on the inner side of the vehicle shown on the left side in the drawing, and is disposed at a position directly below the side frame 11 on the same side. A configuration in which the other side slide rail 4 disposed on the outer side of the vehicle shown on the right side is disposed at a position protruding outward from the side frame 11 on the same side, and the space between the seats in the seat width direction is wide. It is said that.

  However, even if the installation interval of the slide rails 4 is wider than the installation interval of the side frames 11 as described above, the front leg 5A and the rear leg 5B on the outside of the vehicle are arranged on the same side frame 11 as described above. It is located outside and is connected to the extended ends of the front rod 5C and the rear rod 5D that penetrate the side frame 11 on the same side, thereby making up for the dimensional difference in the seat width direction between the two. The front legs 5A and the rear legs 5B can be easily assembled between the side frames 11 and the slide rails 4 having different dimensions without providing additional parts such as brackets for the purpose. It has become.

  2 to 5, the side frame 11 and the front panel 12 on both the left and right sides of the cushion frame 10 described above are joined together by two rivets 13 that are integrally fastened at the front and rear thereof. It is said that it was in the state. Each rivet 13 is constituted by a so-called blind rivet, as shown in FIGS. That is, each rivet 13 spans the front panel 12 between the front end portions of the side frames 11, and the insertion holes 11A and 12A at the two front and rear positions formed on these are aligned with each other. Each rivet 13 is inserted into each insertion hole 11A, 12A from the upper side using a tool T, and the end portion of the insertion is drawn upward and caulked to raise each side frame 11 and the front panel 12 to a higher height. It is the structure which couple | bonds with the state clamped in the direction and fastened integrally.

  As described above, the blind rivet (rivet 13) is used as a means for integrally connecting them in a portion where a large work space cannot be taken on the lower side, such as a contact portion between each side frame 11 and the front panel 12. Accordingly, the side frames 11 and the front panel 12 can be easily fastened in a wide work space on the upper side. In addition, since no welding is used for the above-described connection, distortion and penetration failure due to welding heat do not occur in each side frame 11 and front panel 12, and extra equipment such as a spatter cover is not necessary. The above-described joining operation can be performed easily and satisfactorily. Further, even if the side frames 11 and the front panel 12 are made of different materials, they can be satisfactorily bonded because they are not welded.

  Here, the side frames 11 and the front panel 12 described above are different from each other in that the front panel 12 is disposed on the upper side of each side frame 11 and is formed at two positions on the left and right edges of the front panel 12. Each insertion hole 12A is a round hole, and each insertion hole 11A formed at two positions on the front and rear sides of each side frame 11 arranged below the insertion hole 11A is inserted in each front panel 12. It is configured to have a long hole shape that is longer in the sheet width direction than the hole 12A. Thus, each insertion hole 11A formed at two positions in the front and rear of each side frame 11 has a long hole shape that is long in the seat width direction, so that the front panel 12 is attached to each side frame. 11, it is possible to absorb an error in the assembly position in the sheet width direction when the insertion holes 12 </ b> A and 11 </ b> A are assembled in a state where the insertion holes 12 </ b> A are aligned with each other.

  However, each insertion hole 11A formed in each side frame 11 as described above has a longer hole shape than each insertion hole 12A formed in the front panel 12, so that each side frame 11 and The front panel 12 is considered to be in a state where the front panel 12 can be displaced in the sheet width direction even if they are sandwiched and integrated with each other by the rivets 13 in the height direction. However, in the configuration of the present embodiment, by inserting and caulking each rivet 13 (blind rivet) described above, a part of the caulked shape of each rivet 13 is inserted into each side frame 11 having a large hole diameter described above. The gaps in the radial direction between the rivets 13 are filled by being pushed into the holes 11A. Thereby, each side frame 11 and the front panel 12 can be fastened in a state that does not cause the above-described positional deviation.

  Specifically, each rivet 13 described above is constituted by a known blind rivet. That is, as shown in FIG. 6, each rivet 13 has a cylindrical sleeve 13A, a flange 13B projecting into a disk shape that becomes the head of the sleeve 13A, and a round bar shape inserted into the sleeve of the sleeve 13A. The mandrel 13C is provided. The main body portion including the sleeve 13A and the flange 13B described above is formed of an aluminum alloy, and the mandrel 13C inserted therein is formed of a hard steel wire. The sleeve 13A described above has a cylindrical shape with an outer diameter dimension that is inserted into the insertion hole 12A formed in the front panel 12 almost without backlash, and the flange 13B is larger than the insertion hole 12A. The shape is a diameter. The mandrel 13C is formed in a round bar shape longer than the sleeve 13A. One end of the mandrel 13C is inserted into the sleeve 13A and engaged with the tip of the sleeve 13A, and the other end of the sleeve 13A. It is the state provided in the state which protruded from the head (flange 13B).

  The rivets 13 described above are inserted and fastened through the insertion holes 12A of the front panel 12 and the insertion holes 11A of the side frames 11 according to the following procedure. In addition, below, although the fastening procedure of one place shown in FIG. 4 is demonstrated, the fastening procedure of another fastening place is also the same. First, as shown in FIG. 6, the operator inserts the end of the mandrel 13 </ b> C protruding from the head (flange 13 </ b> B) of the sleeve 13 </ b> A described above into the tool T and attaches the rivet 13 to the tool T. Next, as shown in FIG. 7, the operator holds the tool T and inserts the sleeve 13A of the rivet 13 through the insertion hole 12A of the front panel 12 and the insertion hole 11A of the side frame 11 from above. Thus, the flange 13B is pressed against the upper surface of the front panel 12.

  In this state, by pulling a trigger (not shown) of the tool T described above, the mandrel 13C is drawn into the tool T as shown in FIGS. 8 to 10 and formed at the tip (lower end) of the mandrel 13C. The swelled head portion 13C1 pulls the tip of the sleeve 13A upward, and presses against the bottom surface of the side frame 11 while deforming the tip of the sleeve 13A into a shape that swells radially outward. So that it is crushed.

  At this time, since the insertion hole 11A formed in the side frame 11 is formed in a shape larger than the diameter of the sleeve 13A, the distal end portion of the sleeve 13A to be crushed upward is crushed. Is pushed into the insertion hole 11A of the side frame 11 and crushed into a filled state. This closes the radial gap between the insertion hole 11A of the side frame 11 and the sleeve 13A of the rivet 13, so that the side frame 11 and the front panel 12 are displaced in the radial direction (seat width direction). It will be in the state fastened in the state which does not produce.

  Thus, the seat 1 of the present embodiment is configured such that the front panel 12 of the seat cushion 3 and the side frames 11 are coupled to each other by the rivets 13. The front panel 12 and the side frames 11 are inserted into the insertion holes 12A and 11A formed in the front panel 12 and the rivets 13 so that the front ends of the rivets 13 are caulked. It is set as the structure couple | bonded integrally. One of the insertion holes 11A and 12A (insertion hole 11A) has a larger diameter than the other (insertion hole 12A), and the rivet 13 is inserted into the hole by caulking the rivet 13. A part of the shape is pushed in and a radial gap between the rivet 13 is filled.

  With such a configuration, even if the insertion hole 11A formed in each side frame 11 (one constituent member) is formed large, the rivet 13 is caulked in the hole by caulking the rivet 13. When a part of the shape is pushed in to close the gap, each side frame 11 is connected to the front panel 12 through the rivet 13 so as not to be loose in the radial direction. Therefore, the two members coupled by the rivet 13 as described above can be coupled so as not to be misaligned with each other even if the one insertion hole 11A is formed large.

  Further, by inserting the front panel 12 between the side frames 11 with the rivets 13, the insertion holes 11 </ b> A formed in the side frames 11 are inserted in the front panel 12. By using a long hole that is longer in the sheet width direction than the hole 12A, it is possible to achieve a configuration that can favorably absorb errors in the assembly position between the front panel 12 and each side frame 11.

  Then, the structure of the sheet | seat 1 of Example 2 is demonstrated using FIG. In the present embodiment, the insertion holes 11A formed in each side frame 11 are formed in a state in which the peripheral surface is inclined so as to widen the opening toward the lower side. Thereby, when the sleeve 13A of the rivet 13 is crushed from the tip side and a part of the shape is pushed into the insertion hole 11A, the insertion whose opening is widened by the inclined surface of the peripheral edge described above. It is easy to enter the hole 11A and the shape is crushed along the inclined surface of the insertion hole 11A, so that the gap between the sleeve 13A and the insertion hole 11A is improved with a small amount of collapse. Each side frame 11 can be connected to the rivet 13 in a state in which the side frame 11 does not rattle in the radial direction. Other configurations are the same as those shown in the first embodiment.

  As mentioned above, although embodiment of this invention was described using two Examples, this invention can be implemented with various forms other than the said Example. For example, the “vehicle seat” of the present invention can be applied to seats other than passenger seats of automobiles, and is used for vehicles other than automobiles such as railways, and other vehicles such as airplanes and ships. It can be widely applied to sheets.

  The two components fastened by the rivet are not limited to the combination of the front panel and the side frame of the seat cushion, but are composed of combinations of other members constituting the vehicle seat such as the seat cushion, the seat back, and the headrest. It may be a thing. Further, the shape in which the insertion hole formed in one of the two constituent members has a larger diameter than the insertion hole formed in the other is limited to the long hole as shown in each of the above embodiments. Alternatively, it may be formed of a shape other than a long hole such as a regular circle or a polygon having a large hole diameter over a wide range in the circumferential direction.

  Further, the rivet may not be a so-called blind rivet, but may be a normal type rivet that is caulked with a tool on the end side of the inserted rivet. The rivet may be made of a metal other than an aluminum alloy or other materials such as a resin.

1 seat (vehicle seat)
2 seat back 3 seat cushion 4 slide rail 5 support structure 5A front leg 5B rear leg 5C front rod 5D rear rod 10 cushion frame 11 side frame 11A insertion hole 12 front panel (front frame)
12A insertion hole 13 rivet 13A sleeve 13B flange 13C mandrel 13C1 head T tool

Claims (3)

A vehicle seat in which two components are joined together by rivets,
The two component members are integrally connected to each other by inserting the rivet so as to penetrate through the insertion holes formed in each of the two component members and caulking the end portion into which the rivet is inserted. And
One of the insertion holes has a larger hole diameter than the other, and when the rivet is caulked, a part of the shape of the rivet is pushed into the hole, so that A vehicle seat characterized in that a gap in a radial direction is filled. The vehicle seat according to claim 1,
The two component members are a side frame and a front frame of a seat cushion that are assembled in a state where they are superimposed on each other in the height direction, and the front frame is disposed above the side frame and disposed below. The insertion hole formed in the side frame has a larger diameter than the insertion hole formed in the front frame, and the rivet is inserted into each insertion hole from above using a tool. A vehicle seat, characterized in that the vehicle seat is configured as a blind rivet that is fastened by pulling the end of the inserted tip upward. The vehicle seat according to claim 2,
The front frame is assembled across the left and right side frames of the seat cushion, and is configured to be integrally coupled to each side frame by a fastening structure using the rivets. The vehicle seat, wherein the formed insertion holes are each formed as a long hole having a hole diameter longer in the sheet width direction than the insertion holes formed in the front frame.

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